summaryrefslogtreecommitdiffstats
path: root/debian/patches-rt/0343-rt-PREEMPT_RT-safety-net-for-backported-patches.patch
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:38 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:38 +0000
commit08b74a000942a380fe028845f92cd3a0dee827d5 (patch)
treeaa78b4e12607c3e1fcce8d5cc42df4330792f118 /debian/patches-rt/0343-rt-PREEMPT_RT-safety-net-for-backported-patches.patch
parentAdding upstream version 4.19.249. (diff)
downloadlinux-08b74a000942a380fe028845f92cd3a0dee827d5.tar.xz
linux-08b74a000942a380fe028845f92cd3a0dee827d5.zip
Adding debian version 4.19.249-2.debian/4.19.249-2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'debian/patches-rt/0343-rt-PREEMPT_RT-safety-net-for-backported-patches.patch')
-rw-r--r--debian/patches-rt/0343-rt-PREEMPT_RT-safety-net-for-backported-patches.patch52
1 files changed, 52 insertions, 0 deletions
diff --git a/debian/patches-rt/0343-rt-PREEMPT_RT-safety-net-for-backported-patches.patch b/debian/patches-rt/0343-rt-PREEMPT_RT-safety-net-for-backported-patches.patch
new file mode 100644
index 000000000..b4d67b156
--- /dev/null
+++ b/debian/patches-rt/0343-rt-PREEMPT_RT-safety-net-for-backported-patches.patch
@@ -0,0 +1,52 @@
+From 8961a29e7aa52c929475c767559b23e018fe8b01 Mon Sep 17 00:00:00 2001
+From: Clark Williams <clark.williams@gmail.com>
+Date: Sun, 30 Jan 2022 15:46:27 -0600
+Subject: [PATCH 343/347] rt: PREEMPT_RT safety net for backported patches
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz
+
+While doing some 4.19-rt cleanup work, I stumbled across the fact that parts of
+two backported patches were dependent on CONFIG_PREEMPT_RT, rather than
+the CONFIG_PREEMPT_RT_FULL used in 4.19 and earlier RT series. The commits
+in the linux-stable-rt v4.19-rt branch are:
+
+dad4c6a33bf4e mm: slub: Don't resize the location tracking cache on PREEMPT_RT
+e626b6f873f2c net: Treat __napi_schedule_irqoff() as __napi_schedule() on PREEMPT_RT
+
+Discussing this at the Stable RT maintainers meeting, Steven Rostedt suggested that
+we automagically select CONFIG_PREEMPT_RT if CONFIG_PREEMPT_RT_FULL is on, giving
+us a safety net for any subsequently backported patches. Here's my first cut at
+that patch.
+
+I suspect we'll need a similar patch for stable RT kernels < 4.19.
+
+Suggested-by: Steven Rostedt <rostedt@goodmis.org>
+Signed-off-by: Clark Williams <williams@redhat.com>
+---
+ kernel/Kconfig.preempt | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt
+index 306567f72a3e..fd924c0bcea7 100644
+--- a/kernel/Kconfig.preempt
++++ b/kernel/Kconfig.preempt
+@@ -6,6 +6,9 @@ config PREEMPT_RT_BASE
+ bool
+ select PREEMPT
+
++config PREEMPT_RT
++ bool
++
+ config HAVE_PREEMPT_LAZY
+ bool
+
+@@ -80,6 +83,7 @@ config PREEMPT_RT_FULL
+ depends on IRQ_FORCED_THREADING
+ select PREEMPT_RT_BASE
+ select PREEMPT_RCU
++ select PREEMPT_RT
+ help
+ All and everything
+
+--
+2.36.1
+